Pneumatic pump.



No. 629,8l2. Patented Aug. 1, I899. w. K. PETERS.

PNEUMATIC PUMP.

gApplication filed Oct. 18, 1898. (No Model.) 2 Sheets-Sheet I.

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' UNITED STATES PATENT FFICE.

WILLIAM KQPETERS, OF NE WV YORK, N. Y.,' ASSIGNOR TO MARY l5. PETERS, OFSAME PLACE.

PNEUMATIC PUMP.

SPECIFICATION forming part of Letters Patent No. 629,812, dated August1, 1899-. Application filed October 18, 1898. Serial No. 693,935. (Nomodel.) 7

To aid whom it may concern:

Be it known that I, WILLIAM K. PETERS, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Pneumatic Pumps;and I do declare the following to be afull, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The invention relates to pneumatic pumps, and more particularly tobicycle-pumps and the object is to provide a simple, powerful, andinexpensive pump of this character.

To this end the invention consists in the construction, combination, andarrangement ofv the device, as will be hereinafter inore fullydescribed, and particularly pointed out in the claim.

The accompanying drawings show my invention in the best form now knownto me; but many changes in the details might be made within the skill ofa good mechanic without departing from the spirit of my invention as setforth in the claim at the end of this specification.

The same reference characters indicate the same parts of the invention.

Figure 1 is a plan View of my improved bicycle-pump. Fig. 2 is a similarview showing the piston-rod extended to the full limit of its stroke.Fig. 3 is a detail perspective view of the hinged joint. Fig. 4 is asimilar view of the piston-rod connection. Fig. 5 is a transversesection on the line of pivot-boltJS. Fig.

i 6 shows the manner of fixing the pump to a bench, wall, or othersupport.

1 denotes a bar-frame provided with a handle or grip 2, and its oppositeend is formed with an integral offset 8, having a diagonal or bevelededge 4:, and it terminates in a lonthe free end o'fwhich is alsoprovided with ahandle or grip 9. The lever 8 is provided with an offset10, provided with an integral lateral arm 12, provided with an orificefor the reception 'of the pivot-bolt 13, and its immediate endterminates in limit-stops 11 and 14.

15 denotes the pump barrel or cylinder, provided with the fixed head 16,which is formed with the integral radial parallel lugs 17 1'7, whichextend on opposite sides of ,the bar 1 and are pivoted thereto by meansof the bolt 18, which forms the fulcrum upon which the cylinder 15oscillates. 20 represents the opposite cylinder head or cap, removablysecured thereto and formed with an integral axial guide-sleeve 21 forthe piston-rod 22. The inner end of the piston-rod 22 is provided withthe usual piston, packing-ring, and follower, which being of theordinary approved form require no further description.

23 denotes the cross-head or coupling, fixed to the outer end of thepiston-rod, and it is formed with parallel jaws-which encompass the arm12 of the lever B, and they are pivoted thereto by the bolt 13.

25 denotes a beveled stop formed in the cross-head between the jaws 2424, against which the stop 14L abuts, which serves to limit the outwardmovement of the hand-lever 8,

and when the handles 2 and 9 are brought together the stop 11 on thelever 8 comes in contact with the diagonal edge 4 of the bar 1 andserves to limit the movement of the hand-la ver in that direction.

26 represents a nipple-on the cylinder-head 16, provided with a flexibletube 27, terminating in la screw-coupling28, by means of whichconnection is made to the tire to be inand manipulate thehandle bellowsfashion until the desired result isfaccomp'lished.

A very important advantage of this form of pump is the fact that it canbe operated by hand without being attached to'a fixed support andpossesses all the advantages of that class of pumps known to the bicycletrade as lever-pumps, and another very important advantage is thatwhether it is portably held in the hand or fixed to a support the bestpossible results are attained, as the leverage on the piston-rodincreases as the resistance on the piston increases, the leverage beingthe least when the handles 2 and S) are separated and the piston is atthe beginning of the compression-stroke. There is little or no pressureon it, and when in this position the pivot-points 5, 6, and 13 form atriangle, as shown in Fig. 2, and as the handles approach each other thepiston is forced inward in the cylinder, the air-pressure on the pistonincreases, and at the same time the leverage increases in proportion asthe pivot-points'5, 6, and 13 tend to assume an approximately straightline, thereby securing the powerful leverage of the well-knowntoggle-joint principle as the piston finishes its stroke.

Having thus fully described my invention,

what I claim as new and useful, and desire to secure by Letters Patentof the United States,- 1s- The combination in an air-pump, of thebarframe 1 provided with 'the transverse orifices 29 29 and formed withthe diagonal edge 4, with the hand-lever 8 pivoted to said barframe 1and formed with the lateral arm 12 terminating in the limit-stops 11 and14, the cylinder 15, the head 16 fixed to said cylinder and providedwith the integral jaws 17 17 and the pivot-bolt 18 connecting said jawsand bar-frame, the cap 20 and the piston-rod 22 pivoted at its outer endto said lateral arm 12, substantially as shown and described.

In testimony whereof I have hereunto set my hand in presence of thesubscribing witnesses.

XVI'LLIAM K. PETERS.

\Vitnesses:

EDWARD GOLDSCHMIDT, Row. 11. SMITH, DAVID F. TOUMEY.

